Telrad upgraded their standard shield and made the Reflex Sight Dew Shield+ to help slow or prevent dew condensation, dirt, and dust from accumulating on the sight's window while also providing more viewing options. A mirror is integrated into the inside of the shield housing that allows you to set the housing at various angles when not covering the window to make it more comfortable to use the sight when installed on reflectors, refractors and SCT's that are aimed at or near the zenith. It installs using existing screws so no permanent modifications are required for its installation and use.